Quantum mechanics

Anisotropy

Failure mode and effects analysis

Engineering

Geotechnical engineering

Hoek–Brown failure criterion

Principal stress

Rock mass classification

Operating system

Joint (building)

Computer science

Constitutive equation

Geology

Physics

Finite element method

Mathematics

Optics

Mathematical analysis

Structural engineering

Cauchy stress tensor

Mode (computer interface)

Computers and Geotechnics

This paper proposes an elasto-perfect plastic constitutive model (called Jhoek) linking two failure criteria to model the sliding and non-sliding failure modes of anisotropic rocks. For non-sliding failure mode, modified Hoek-Brown criterion with an explicit function of the rock parameter mi with orientation β is applied, while the single plane of weakness is simulating the sliding failure mode. Published experimental datasets of anisotropic rocks are used to validate this model. Jhoek could predict failure envelopes of rock samples under triaxial loading conditions at different orientation angles. Besides that, Jhoek model shows sensitivity to the intermediate principal stress in 3-dimensional cases.

Constitutive model for inherent anisotropic rocks: Ubiquitous joint model based on the Hoek-Brown failure criterion